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launching heavy projectiles....gravity

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: psycix » Thu Jul 17, 2008 1:11 pm

Note that GGDT is designed and calibrated to suit normal spudgun velocities. On extremely low or high input or output variables, it probably gets off by a lot. Its the most accurate in normal spudgun range.
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Unread postAuthor: trollhameran » Thu Jul 17, 2008 2:59 pm

Thanks for the info psycix, I think the best thing to do is try and get my hands on some 4" pvc and do some tests with some weights to find out how accurate it is as i dont fancy ending up 100 feet in the air killing myself lol, I dont think that is very likely though.
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Unread postAuthor: n-strike » Thu Jul 17, 2008 5:04 pm

May I ask why you are launching it straight up into the air?
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What a waste of 300 spud bux.
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Unread postAuthor: DYI » Thu Jul 17, 2008 5:23 pm

May I ask why you are launching it straight up into the air?


Isn't it obvious? He's going to use it to pick off those pesky ambulance helicopters that fly over his house and wake him up at night.
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Unread postAuthor: n-strike » Thu Jul 17, 2008 8:13 pm

I see. Well...good luck then. :roll:
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What a waste of 300 spud bux.
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Unread postAuthor: VH_man » Thu Jul 17, 2008 9:15 pm

a GB hybrid shot straight up would make a handy anti-aircraft gun, seeing as a GB flying at the speed of sound has the same amount of energy as an anti-aircraft round.............

but thats a bad plann.... right :!:
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Unread postAuthor: DYI » Thu Jul 17, 2008 9:55 pm

a GB hybrid shot straight up would make a handy anti-aircraft gun, seeing as a GB flying at the speed of sound has the same amount of energy as an anti-aircraft round.............


Which anti-aircraft round? It must be a pretty pathetic one...

And no, it isn't a good idea. If you're going to be shooting down aircraft, you want something that is accurate, high velocity, and easy to reload - non of which a conventional hybrid will deliver :wink:
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Unread postAuthor: brogdenlaxmiddie » Thu Jul 17, 2008 10:56 pm

DYI wrote:non of which a conventional hybrid will deliver :wink:


Well, he could always borrow one of your hybrids then :lol:
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Unread postAuthor: Coodude26 » Thu Jul 17, 2008 11:27 pm

Nice but instead of downloading that program and launching excel you could use the equation S=1/2 A T^2.
S=altitude
A = Constant of gravity (32 fps)
T = time from shooting to impact into ground.
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Unread postAuthor: frankrede » Fri Jul 18, 2008 12:09 am

DYI wrote:
a GB hybrid shot straight up would make a handy anti-aircraft gun, seeing as a GB flying at the speed of sound has the same amount of energy as an anti-aircraft round.............


Which anti-aircraft round? It must be a pretty pathetic one...

And no, it isn't a good idea. If you're going to be shooting down aircraft, you want something that is accurate, high velocity, and easy to reload - non of which a conventional hybrid will deliver :wink:


I just pictured FEAR with its 50 ft barrel aiming into the sky.....hahahaha
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Unread postAuthor: trollhameran » Fri Jul 18, 2008 1:51 am

Those dam helicopters get on my nerves lol

It is going to be used to launch unsuspecting heavy objects into outer space...well not quite that high.

So far the plan is to use 55 inches of 4 inch pvc with a burst disc somewhere in the middle
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 18, 2008 2:51 am

If you're hunting choppers, you're better of with one of these:

[youtube]http://youtube.com/watch?v=aq_y6kkDO7Y[/youtube]

:D
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Unread postAuthor: SpudFarm » Fri Jul 18, 2008 3:48 am

that is amazing jack! :shock:
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Unread postAuthor: Ragnarok » Fri Jul 18, 2008 5:18 am

jackssmirkingrevenge wrote:If you're hunting choppers, you're better of with one of these

It sounds like whoever was composing the music for that had been listening to Europe's "Final Countdown" too much - at least, that's what I thought of when I saw the end of that video.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: THUNDERLORD » Fri Jul 18, 2008 7:31 am

If you're hunting choppers, you're better of with one of these:...


I once was talking with a guy who served with the Bosnian army, and he was explaining something very similar that the Serbians would fire at them. And he said even when it would hit fairly close to infantry troops they'd just laugh at it. Because it sounded like a bunch of .22's going off and never hit any of them. :shock:

At the time I didn't know what he was describing, because it was a dual AA or Anti-ground weapon. It sure sounded similar to that vid. :roll: 8)
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